Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

In Virtual Machine Manager admin console, I used the 'New virtual machine' wizard and created a machine from an existing template.

When I got to the Configure Hardware step, I selected the primary hard disk (which is a dynamic) disk and tried to increase it's maximum size, but this control is disabled so I can't increase it.

alt text

It's not big enough for my purposes. how do I increase the maximum size of the hard-disk?


Edit: I am able to add a second hard disk of a size I specify. That's not useful though as I'm trying to install some software, some of which insists on being on drive C.

share|improve this question

Virtual disks cannot be edited when the virtual machine is running or in a saved state. Stop the virtual machine, then try again.

A virtual disk also cannot be edited when any checkpoints exist. You will have to delete all existing checkpoints to be able to resize the disk. However, the Channel drop-down list is only disabled (as in the above screenshot) when the VM is running.

share|improve this answer

System drives cannot be increased in size this way with basic operating system tools. You can, however, Get Creative. One approach is to use this utility: Says it's for Dell, but I've used it on VMs before.

share|improve this answer
Looks like that might help people using VMWare with a 2003 32 bit machine. I'm using Virtual Machine Manager though and, I didn't mention it before, but my VM has a Windows7 64 bit OS. – Scott Langham Oct 6 '10 at 13:56

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.